It is a happy number.
It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 949301 = 269 ⋅3529.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-103949 is a prime.
It is a congruent number.
2103949 is an apocalyptic number.
103949 is a gapful number since it is divisible by the number (19) formed by its first and last digit.
It is an amenable number.
103949 is an equidigital number, since it uses as much as digits as its factorization.
103949 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 5490.
The square root of 103949 is about 322.4112280923. The cubic root of 103949 is about 47.0190054418.
The spelling of 103949 in words is "one hundred three thousand, nine hundred forty-nine".